<?xml version="1.0"?>
<edgarSubmission>

    <schemaVersion>X0704</schemaVersion>

    <submissionType>D</submissionType>

    <testOrLive>LIVE</testOrLive>

    <primaryIssuer>
        <cik>0001297107</cik>
        <entityName>CoastalSouth Bancshares, Inc.</entityName>
        <issuerAddress>
            <street1>5 BOW CIRCLE</street1>
            <city>HILTON HEAD ISLAND</city>
            <stateOrCountry>SC</stateOrCountry>
            <stateOrCountryDescription>SOUTH CAROLINA</stateOrCountryDescription>
            <zipCode>29928</zipCode>
        </issuerAddress>
        <issuerPhoneNumber>843-341-9900</issuerPhoneNumber>
        <jurisdictionOfInc>VIRGINIA</jurisdictionOfInc>
        <issuerPreviousNameList>
            <value>None</value>
        </issuerPreviousNameList>
        <edgarPreviousNameList>
            <previousName>Coastal South Bancshares Inc</previousName>
        </edgarPreviousNameList>
        <entityType>Corporation</entityType>
        <yearOfInc>
            <overFiveYears>true</overFiveYears>
        </yearOfInc>
    </primaryIssuer>

    <relatedPersonsList>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Randy</firstName>
                <middleName>K.</middleName>
                <lastName>Dolyniuk</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>c/o CoastalSouth Bancshares, Inc.</street1>
                <street2>5 Bow Circle</street2>
                <city>Hilton Head Island</city>
                <stateOrCountry>SC</stateOrCountry>
                <stateOrCountryDescription>SOUTH CAROLINA</stateOrCountryDescription>
                <zipCode>29928</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Executive Officer</relationship>
                <relationship>Director</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification>Chairman, Chief Executive Officer</relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>James</firstName>
                <middleName>S</middleName>
                <lastName>MacLeod</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>c/o CoastalSouth Bancshares, Inc.</street1>
                <street2>5 Bow Circle</street2>
                <city>Hilton Head Island</city>
                <stateOrCountry>SC</stateOrCountry>
                <stateOrCountryDescription>SOUTH CAROLINA</stateOrCountryDescription>
                <zipCode>29928</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Executive Officer</relationship>
                <relationship>Director</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification>President; Director</relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Charles</firstName>
                <middleName>D.</middleName>
                <lastName>Christy</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>c/o CoastalSouth Bancshares, Inc.</street1>
                <street2>5 Bow Circle</street2>
                <city>Holton Head Island</city>
                <stateOrCountry>SC</stateOrCountry>
                <stateOrCountryDescription>SOUTH CAROLINA</stateOrCountryDescription>
                <zipCode>29928</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Executive Officer</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification>Chief Financial Officer</relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>J.</firstName>
                <middleName>Simon</middleName>
                <lastName>Fraser</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>c/o CoastalSouth Bancshares, Inc.</street1>
                <street2>5 Bow Circle</street2>
                <city>Hilton Head Island</city>
                <stateOrCountry>SC</stateOrCountry>
                <stateOrCountryDescription>SOUTH CAROLINA</stateOrCountryDescription>
                <zipCode>29928</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Director</relationship>
            </relatedPersonRelationshipList>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Ernst</firstName>
                <middleName>W.</middleName>
                <lastName>Bruderer</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>c/o CoastalSouth Bancshares, Inc.</street1>
                <street2>5 Bow Circle</street2>
                <city>Hilton Head Island</city>
                <stateOrCountry>SC</stateOrCountry>
                <stateOrCountryDescription>SOUTH CAROLINA</stateOrCountryDescription>
                <zipCode>29928</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Director</relationship>
            </relatedPersonRelationshipList>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>John</firstName>
                <middleName>J.</middleName>
                <lastName>Moran</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>c/o CoastalSouth Bancshares, Inc.</street1>
                <street2>5 Bow Circle</street2>
                <city>Hilton Head Island</city>
                <stateOrCountry>SC</stateOrCountry>
                <stateOrCountryDescription>SOUTH CAROLINA</stateOrCountryDescription>
                <zipCode>29928</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Director</relationship>
            </relatedPersonRelationshipList>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Larry</firstName>
                <middleName>W.</middleName>
                <lastName>Page</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>c/o CoastalSouth Bancshares, Inc.</street1>
                <street2>5 Bow Circle</street2>
                <city>Hilton Head Island</city>
                <stateOrCountry>SC</stateOrCountry>
                <stateOrCountryDescription>SOUTH CAROLINA</stateOrCountryDescription>
                <zipCode>29928</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Director</relationship>
            </relatedPersonRelationshipList>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>James</firstName>
                <middleName>N.</middleName>
                <lastName>Richardson, Jr</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>c/o CoastalSouth Bancshares, Inc.</street1>
                <street2>5 Bow Circle</street2>
                <city>Hilton Head Island</city>
                <stateOrCountry>SC</stateOrCountry>
                <stateOrCountryDescription>SOUTH CAROLINA</stateOrCountryDescription>
                <zipCode>29928</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Director</relationship>
            </relatedPersonRelationshipList>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Scott</firstName>
                <middleName>H.</middleName>
                <lastName>Richardson</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>c/o CoastalSouth Bancshares, Inc.</street1>
                <street2>5 Bow Circle</street2>
                <city>Hilton Head Island</city>
                <stateOrCountry>SC</stateOrCountry>
                <stateOrCountryDescription>SOUTH CAROLINA</stateOrCountryDescription>
                <zipCode>29928</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Director</relationship>
            </relatedPersonRelationshipList>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>James</firstName>
                <middleName>H.</middleName>
                <lastName>Hodges</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>c/o CoastalSouth Bancshares, Inc.</street1>
                <street2>5 Bow Circle</street2>
                <city>Hilton Head Island</city>
                <stateOrCountry>SC</stateOrCountry>
                <stateOrCountryDescription>SOUTH CAROLINA</stateOrCountryDescription>
                <zipCode>29928</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Director</relationship>
            </relatedPersonRelationshipList>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>W.</firstName>
                <middleName>Lee</middleName>
                <lastName>McCollum</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>c/o CoastalSouth Bancshares, Inc.</street1>
                <street2>5 Bow Circle</street2>
                <city>Hilton Head Island</city>
                <stateOrCountry>SC</stateOrCountry>
                <stateOrCountryDescription>SOUTH CAROLINA</stateOrCountryDescription>
                <zipCode>29928</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Director</relationship>
            </relatedPersonRelationshipList>
        </relatedPersonInfo>
    </relatedPersonsList>

    <offeringData>
        <industryGroup>
            <industryGroupType>Commercial Banking</industryGroupType>
        </industryGroup>
        <issuerSize>
            <revenueRange>Decline to Disclose</revenueRange>
        </issuerSize>
        <federalExemptionsExclusions>
            <item>06</item>
        </federalExemptionsExclusions>
        <typeOfFiling>
            <newOrAmendment>
                <isAmendment>false</isAmendment>
            </newOrAmendment>
            <dateOfFirstSale>
                <value>2011-03-31</value>
            </dateOfFirstSale>
        </typeOfFiling>
        <durationOfOffering>
            <moreThanOneYear>false</moreThanOneYear>
        </durationOfOffering>
        <typesOfSecuritiesOffered>
            <isEquityType>true</isEquityType>
            <isOtherType>true</isOtherType>
            <descriptionOfOtherType>Common Stock.  The minimum investment in Item 11 may be reduced at the diecretion of the management of the Issuer.</descriptionOfOtherType>
        </typesOfSecuritiesOffered>
        <businessCombinationTransaction>
            <isBusinessCombinationTransaction>false</isBusinessCombinationTransaction>
        </businessCombinationTransaction>
        <minimumInvestmentAccepted>50000</minimumInvestmentAccepted>
        <salesCompensationList></salesCompensationList>
        <offeringSalesAmounts>
            <totalOfferingAmount>18000000</totalOfferingAmount>
            <totalAmountSold>2316667</totalAmountSold>
            <totalRemaining>15683333</totalRemaining>
        </offeringSalesAmounts>
        <investors>
            <hasNonAccreditedInvestors>false</hasNonAccreditedInvestors>
            <totalNumberAlreadyInvested>46</totalNumberAlreadyInvested>
        </investors>
        <salesCommissionsFindersFees>
            <salesCommissions>
                <dollarAmount>0</dollarAmount>
            </salesCommissions>
            <findersFees>
                <dollarAmount>0</dollarAmount>
            </findersFees>
        </salesCommissionsFindersFees>
        <useOfProceeds>
            <grossProceedsUsed>
                <dollarAmount>0</dollarAmount>
            </grossProceedsUsed>
        </useOfProceeds>
        <signatureBlock>
            <authorizedRepresentative>false</authorizedRepresentative>
            <signature>
                <issuerName>CoastalSouth Bancshares, Inc.</issuerName>
                <signatureName>/s/Charles D. Christy</signatureName>
                <nameOfSigner>Charles D. Christy</nameOfSigner>
                <signatureTitle>Chief Financial Officer</signatureTitle>
                <signatureDate>2011-05-10</signatureDate>
            </signature>
        </signatureBlock>
    </offeringData>
</edgarSubmission>
